CN103804572A - Synthesis process of binary co-polymerized anti-scaling agent based on control of reaction temperature - Google Patents
Synthesis process of binary co-polymerized anti-scaling agent based on control of reaction temperature Download PDFInfo
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- CN103804572A CN103804572A CN201210480184.7A CN201210480184A CN103804572A CN 103804572 A CN103804572 A CN 103804572A CN 201210480184 A CN201210480184 A CN 201210480184A CN 103804572 A CN103804572 A CN 103804572A
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Abstract
The invention discloses a synthesis process of a binary co-polymerized anti-scaling agent based on control of a reaction temperature. The synthesis process comprises the following steps: (a) firstly, preparing chelated group monomers and acrylamide according to a certain ratio; (b) secondly, adding the chelated group monomers and the acrylamide into a reaction container; adding a solvent for dissolving; and adding a catalyst and an initiator; (c) sufficiently and uniformly mixing materials through stirring; (d) putting a mixture into a water bath; reacting at a temperature of 60-90 DEG C for a while, so as to obtain a mixture of reaction products; and (e) cooling the mixture of the reaction products; filtering, carrying out reduced pressure distillation on a filtered liquid; and separating to obtain a target product. With the adoption of the synthesis process provided by the invention, the binary co-polymerized anti-scaling agent can be successfully synthesized; the synthesized binary co-polymerized anti-scaling agent has good properties; the synthesis steps are simple and the synthesis cost is low; and furthermore, the anti-scaling property of the target product can be improved by controlling the reaction temperature in the synthesis process.
Description
Technical field
The present invention relates to a kind of synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction.
Background technology
In oilfield exploitation procedure, fluid (oil, G&W) in hydrocarbon-bearing pool flows out from stratum, through pit shaft, well head to surface gathering system, due to the variation of the condition such as temperature, pressure and the thermodynamic phase of water and chemical incompatibility, cause oil gas water balance state to be destroyed.Often cause water filling stratum, tubing and casing, down-hole, uphole equipment and gathering system to occur fouling.Fouling has larger impact to the normal production of oil well, in the time that dirt deposition is on the equipment such as pit shaft, oil pipe, oil well pump, waterflood system, gathering system, heating system, can cause equipment not run well, heat transfer efficiency reduces, cause throughput to decline, and fouling also can cause the corrosion of equipment and pipeline, cause serious financial loss to oil field.
Existing scale inhibitor mainly contains aminopolycanboxylic acid's salt, organic multicomponent phosphonic acid based and organic polymer three major types.Aminopolycanboxylic acid's salt Chelate stability constants is large, can be used for comparatively high temps, but consumption is large, and cost is high; Organic multicomponent phosphonic acids to barium sulfate, Strontium Sulphate without antiscaling effect; And what mostly use is organic polymer scale inhibitor, uses monomer and maleic anhydride, acrylic acid copolymer to expect raising antiscaling rate more, but owing to fundamentally not changing polymer architecture, do not reach the antiscaling effect of expection.
In crude oil production process, fouling is a kind of ubiquitous phenomenon, and fouling is simultaneously one of the most serious problem running in the control of oil-field water water quality.Fouling has larger impact to the normal production of oil well, and dirt deposition can stop up formation pore, crack on stratum, cause permeability reduction, and crude production rate is declined, and even causes oil well to stop production when serious, and the oil reservoir lower on rate of permeation affects more very; In the time that dirt deposition is on the equipment such as pit shaft, oil pipe, oil well pump, waterflood system, gathering system, heating system, can cause equipment not run well, heat transfer efficiency reduces, cause throughput to decline, and fouling also can cause the corrosion of equipment and pipeline, cause serious financial loss to oil field.
The modal dirty type in oil field has calcite calcium carbonate (CaCO3), gypsum terra alba, anhydrite calcium sulfate (CaSO4), rock salt (NaCl), barite sulfate barium (BaSO4) and lazurite Strontium Sulphate (SrSO4).And the Strontium Sulphate of trace is often present in a large amount of barium sulfate, be difficult to them to separate.
The major cause of fouling is due to pressure or temperature change, evaporation or two kinds of water of 5 of mismatching mix mutually, make the inorganic salt (CaCO3, CaSO4 or BaSO4) that are originally present in the aqueous solution with ionic condition reach hypersaturated state, exceeded their solubleness and crystallize out into dirt.Fouling process is the process of certain density incrustation ion crystallization and gathering under certain physical and chemical condition (as pressure, temperature) and equipment surface situation.It is the basic reason that causes fouling that equilibrium state goes to pot.
For the various fouling situations in oil field, there are two class solutions: the one, scale removal; The 2nd, antiscale.Scale removal is a kind of remedial measures, and when scale removal, the corrosion that it has produced the underproduction and equipment, has caused larger financial loss, therefore, prevents that dirty generation is only a kind of good measure.In the method for antiscale, with chemical agent antiscale be people generally acknowledge the simplest, effectively, convenient, economic method.Therefore each oil field all adapts to the chemical scale inhibition agent of different condition for block the characteristic study separately.And develop the efficient scale inhibitor common objective that just generally pursue in each oil field especially.
In the process of synthetic binary copolymerization scale inhibitor, temperature of reaction will directly have influence on the performance of the target product synthesizing, therefore determine a suitable temperature of reaction, the synthesis technique of binary copolymerization scale inhibitor is seemed to particularly important.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction is provided, this synthesis technique can successfully synthesize binary copolymerization scale inhibitor, and the excellent property of the binary copolymerization scale inhibitor synthesizing, synthesis step is simple, synthetic cost is low, and by controlling the temperature of reaction in reaction process, thereby improve the anti-scaling property of target product.
Object of the present invention is achieved through the following technical solutions: a kind of synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction, comprises the following steps:
(a) first, prepare according to a certain percentage chelating group monomer and acrylamide;
(b) chelating group monomer and acrylamide are joined in reaction vessel, then add after dissolution with solvents, add initiator and catalyzer;
(c) stir and allow it fully mix;
(d) be placed in water-bath, at the temperature of 60 ℃～90 ℃, react after for some time, obtain mixture of reaction products;
(e) mixture of reaction products is cooling, and make filtration treatment, after filtering, liquid pressure-reducing distillation, obtains target product after separation.
Described reaction vessel is beaker.
In described step (e), carry out filtration treatment by molecular sieve.
In described step (e), carry out underpressure distillation by rotatory evaporator.
Described temperature of reaction is 70 ℃.
Described temperature of reaction is 75 ℃.
Described temperature of reaction is 80 ℃.
In sum, the invention has the beneficial effects as follows: can successfully synthesize binary copolymerization scale inhibitor, and the excellent property of the binary copolymerization scale inhibitor synthesizing, synthesis step is simple, synthetic cost is low, and by controlling the temperature of reaction in reaction process, thereby improve the anti-scaling property of target product.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The synthesis technique of a kind of binary copolymerization scale inhibitor based on control temperature of reaction the present invention relates to, comprises the following steps:
(a) first, prepare according to a certain percentage chelating group monomer and acrylamide;
(b) chelating group monomer and acrylamide are joined in reaction vessel, then add after dissolution with solvents, add initiator and catalyzer;
(c) stir and allow it fully mix;
(d) be placed in water-bath, at the temperature of 60 ℃～90 ℃, react after for some time, obtain mixture of reaction products;
(e) mixture of reaction products is cooling, and make filtration treatment, after filtering, liquid pressure-reducing distillation, obtains target product after separation.
Described reaction vessel is beaker.
In described step (e), carry out filtration treatment by molecular sieve.
In described step (e), carry out underpressure distillation by rotatory evaporator.
Described temperature of reaction is 70 ℃.
Described temperature of reaction is 75 ℃.
Described temperature of reaction is 80 ℃.
Fixing initiator amount is 0.5% of monomer mass, and the mol ratio of new monomer and acrylamide is 6: 4, and the mass ratio of water and monomer is 2: 1, pH=7.0, while changing polymerization system temperature, make multipolymer scale inhibitor, inquire into the relation of temperature of reaction and antiscaling rate, it the results are shown in shown in following table:
As seen from the above table: along with the rising of temperature, antiscaling rate increases gradually, in the time being elevated to 75 ℃, antiscaling rate reaches maximum value, then continues to raise, and antiscaling rate slightly reduces.This is that its decomposition temperature is 70 ℃ of left and right because the initiator using is ammonium persulphate, and polymerization temperature is too low, and decomposition of initiator speed is slow, and free radical is few, and inductive phase is long, and prepared polymkeric substance antiscaling effect is bad; Excess Temperature, causes rate of decomposition fast, and free radical is many, and chain termination speed is fast, and polymkeric substance relative molecular weight is low, does not reach the requirement of scale inhibitor, and meanwhile, excess Temperature increases rate of side effects in polymerization reaction system, also can cause antiscaling effect variation.Therefore polymerization temperature is determined at 75 ℃.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.
Claims (7)
1. the synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction, is characterized in that, comprises the following steps:
(a) first, prepare according to a certain percentage chelating group monomer and acrylamide;
(b) chelating group monomer and acrylamide are joined in reaction vessel, then add after dissolution with solvents, add initiator and catalyzer;
(c) stir and allow it fully mix;
(d) be placed in water-bath, at the temperature of 60 ℃～90 ℃, react after for some time, obtain mixture of reaction products;
(e) mixture of reaction products is cooling, and make filtration treatment, after filtering, liquid pressure-reducing distillation, obtains target product after separation.
2. the synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction according to claim 1, is characterized in that, described reaction vessel is beaker.
3. the synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction according to claim 1, is characterized in that, in described step (e), carries out filtration treatment by molecular sieve.
4. the synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction according to claim 1, is characterized in that, in described step (e), carries out underpressure distillation by rotatory evaporator.
5. the synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction according to claim 1, is characterized in that, described temperature of reaction is 70 ℃.
6. the synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction according to claim 1, is characterized in that, described temperature of reaction is 75 ℃.
7. the synthesis technique of the binary copolymerization scale inhibitor based on control temperature of reaction according to claim 1, is characterized in that, described temperature of reaction is 80 ℃.
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| CN201210480184.7A CN103804572A (en) | 2012-11-13 | 2012-11-13 | Synthesis process of binary co-polymerized anti-scaling agent based on control of reaction temperature |
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| CN201210480184.7A CN103804572A (en) | 2012-11-13 | 2012-11-13 | Synthesis process of binary co-polymerized anti-scaling agent based on control of reaction temperature |
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Application publication date: 20140521 |